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Priority to JP4444172UpriorityCriticalpatent/JPS526363Y2/ja
Priority to GB1213573Aprioritypatent/GB1378115A/en
Priority to US342718Aprioritypatent/US3900956A/en
Publication of JPS494741UpublicationCriticalpatent/JPS494741U/ja
Application grantedgrantedCritical
Publication of JPS526363Y2publicationCriticalpatent/JPS526363Y2/ja